VDB
CVE-2026-43666
CVE-2026-43666
PUBLISHED
CVSS 9.300000190734863 CRITICAL
An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 18.7.9 and iPadOS 18.7.9, iOS 26.5 and iPadOS 26.5, macOS Sequoia 15.7.7, macOS Sonoma 14.8.7, macOS Tahoe 26.5, tvOS 26.5, visionOS 26.5, watchOS 26.5. An attacker on the local network may be able to cause a denial-of-service.
EPSS 0.01% · 2.8th percentile
Risk Scores
CVSS 4.0
9.300000190734863
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
EPSS Score
0.01%
2.8th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Apple | watchOS | 0 |
| Apple | tvOS | 0 |
| Apple | visionOS | 0 |
| Apple | iOS and iPadOS | 0, 0 |
| Apple | macOS | 0, 0, 0 |
Timeline
- May 11, 2026 CVE Published
- May 12, 2026 Security Advisory
- May 18, 2026 EPSS Score
- May 19, 2026 EPSS Score
- May 20, 2026 EPSS Score
- May 21, 2026 EPSS Score
- May 22, 2026 EPSS Score
- May 23, 2026 EPSS Score
- May 24, 2026 EPSS Score
- May 25, 2026 EPSS Score
- May 26, 2026 EPSS Score
- May 27, 2026 EPSS Score
References
- https://support.apple.com/en-us/127110 url
- https://support.apple.com/en-us/127111 url
- https://support.apple.com/en-us/127115 url
- https://support.apple.com/en-us/127116 url
- https://support.apple.com/en-us/127117 url
- https://support.apple.com/en-us/127118 url
- https://support.apple.com/en-us/127119 url
- https://support.apple.com/en-us/127120 url
- https://nvd.nist.gov/vuln/detail/CVE-2026-43666 advisory
- https://support.apple.com/en-us/127114 advisory
- https://support.apple.com/en-us/127113 advisory
- https://support.apple.com/en-us/127112 advisory